About the modeling of underflooding and land drainage with the fortran

Considered of the methodology of the modeling of groundwater filtration in soils for protection against flooding in urban construction and agriculture. The aim of the study is the use of a numerical finite difference method for modeling of groundwater flow using algorithms written in fortran programming. Scientific novelty of the article is contained in the special techniques and algorithms contained in the author’s design in the programming language fortran. This binding is made of theoretical calculations to the practice of hydrogeological work in conditions of flooded land. The study was conducted with the theoretical calculations on the example of the city of Kaluga, using the author’s program on the fortran, specially designed for the topic. We consider the pressure transient filtering groundwater in the sand during pumping of the 13 wells under the scheme unlimited in terms of the aquifer. To model adopted in terms of land size of 500 by 500 meters. Computer model of dewatering method uses finite difference explicit scheme. Steps spatial grid pattern in the horizontal and vertical directions are assumed equal. Time Step on the model adopted by the maximum possible, taking into account the scheme account for the apparent stability criterion. Estimated time on a computer model with a frequency of 2.13 GHz, it turned from a few seconds up to 10 minutes. calculation results are recorded in the output text files. According to him the maps of groundwater pressures when the system of 13 wells vodoponizitelnyh. In contrast to the traditional algorithm of computational mathematics with the cycle for-end solutions for the difference scheme applied nested loop Fortran do-end. Tests have shown an increase in the velocity model calculation of three orders of magnitude, that is about a thousand times.